期刊论文

中文

有色金属(冶炼部分)

1007-7545

2018

9

61-66

10.3969/j.issn.1007-7545.2018.09.015

21790373:国家自然科学基金 91426302:国家自然科学基金

本校为第一机构

在923 K、LiCl熔盐中,通过两电极体系直接电解还原CeO2-5NiO、CeO2-2.5Bi2 O3、CeO2-5ZnO三种混合氧化物制备相应的金属间化合物.从热力学上计算了3种混合氧化物的理论分解电压,并采用循环伏安法研究其电化学行为,验证了电解还原的可行性.结果表明,3种混合氧化物分别在3.2V被直接电解还原4h,NiO、Bi2O3、ZnO均能在CeO2发生还原反应前生成对应的金属单质,然后促进CeO2还原.得到的电解产物分别为CeNi5/Ni、CeBi/Bi、CeZn5/Ce3Zn22/CeZn3.3种电解产物的微观形貌分别为絮状、堆积状和块状.

Intermetallic compounds of Ce-Ni,Ce-Bi and Ce-Zn were prepared from their mixture oxides（CeO2-5NiO,CeO2-2.5Bi2O3 and CeO2-5ZnO）by constant voltage electrolysis in LiCl molten salt at 923 K.In order to verify the feasibility of electrochemical reduction of these oxides,theoretical decomposition voltage was calculated by Standard Gibbs Free Energy,and electrochemical reduction behaviors of these oxides and mixture oxides were investigated by Cyclic Voltammetry（CV）measurement.The results show that electrochemical reductions of NiO,Bi2O3 and Zn...